When people organize, they try to establish what is going on and what is expected of them. For this process the term 'sensemaking' was introduced in the second half of the twentieth century and it has become a much-used concept in organization and management theories and practices. However, the sensemaking perspective has become fragmented, and ontological differences and inconsistencies have developed in the notion of sensemaking itself. In this book, a systematic, critical review is undertaken of some of the core concepts and assumptions of sensemaking, employing philosophical theory to advance our understanding and enhance the productive capacity of this organization and management framework. It will be of great interest to scholars and students of organization studies, management and philosophy of management.